<!DOCTYPE html>
<html>
<head>
	<title>baidu_task2.4</title>
	<link rel="stylesheet" type="text/css" href="css/style.css">
</head>
<body>
	<div>
		<input id="inputnum" type="text" name="text">
		<button onclick="leftIn()">左侧入</button>
		<button onclick="rightIn()">右侧入</button>
		<button onclick="leftOut()">左侧出</button>
		<button onclick="rightOut()">右侧出</button>
	</div>
	<div id="out">
	</div>
<script type="text/javascript" src="js/main.js"></script>
</body>
</html>